Coming from not America's youth, being 47 years old, I wasn't too lazy to go to Panaracer's web site as I indeed go there first. However, my lack of knowledge in bicycle tire terminology led me to post the question here. Panaracer's desrciption of the tires:

[h=2]T-SERV PT[/h]T-Serv is a great performance tire for urban city use, incorporating ZSG compound, 400D Lite Extra Cord, and PT technologies. Hands down, T-Serv PT is the best urban strength to weight ratio tire on the market today. Need to get through your urban jungle quickly and reliably? T-serv PT is the answer.


[h=2]PASELA[/h]Pasela is our standard all around touring or urban commuting tire. Its comprehensive size range insures that you can find a Pasela for most any usage. Ride it and trust it. 2 tread patterns available.


The part that confused me the most was why they use what looks like the same tread pattern yet call it two different names. I would think they would just use a smilar name and make an ammendment to it, like the Pasela and Pasela TG.

Now, I don't ask questions here too often, I am one to do simple research - but when I don't understand the results of the research I'll ask. I apologize for wasting other's time.